When Dinah Glass joins a new foster family, she discovers that her school is under the hypnotic control of a sinister headmaster. Dinah attempts to navigate the social hostility of her foster brothers while investigating the unnatural, robotic behavior of her classmates. She faces the logical constraint of a school environment where authority figures possess inexplicable influence over the student body. The narrative unfolds through a dramatic script format, emphasizing dialogue and stage directions to convey the mounting tension between the protagonist and the antagonist.

Readers frequently highlight the effectiveness of the script format in translating the suspense of the original novel into a performative medium. Discussion often centers on the chilling nature of the Headmaster as a villain and the relatable struggle of a protagonist trying to maintain her autonomy in a controlled environment. Critics note that the pacing remains brisk, making it an accessible choice for classroom settings or youth theater groups. The play successfully maintains the core mystery of the source material while providing clear, actionable roles for young actors to explore themes of power and resistance.